There is some common code between ether1394_open and ether1394_add_host
which can be moved to a separate helper function for a slightly smaller
eth1394 driver (-160 bytes on i386.)
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>

Until now, ieee1394 put an IP-over-1394 capability entry into each new
host's config ROM.  As soon as the controller was initialized --- i.e.
right after modprobe ohci1394 --- this entry triggered a hotplug event
which typically caused auto-loading of eth1394.

This irritated or annoyed many users and distributors.  Of course they
could blacklist eth1394, but then ieee1394 wrongly advertized IP-over-
1394 capability to the FireWire bus.

Therefore
  - remove the offending kernel config option
    IEEE1394_CONFIG_ROM_IP1394,
  - let eth1394 add the ROM entry by itself, i.e. only after eth1394 was
    loaded.

This fixes http://bugzilla.kernel.org/show_bug.cgi?id=7793 .

To emulate the behaviour of older kernels, simply add the following to
to /etc/modprobe.conf:

install ohci1394 /sbin/modprobe eth1394; \
                 /sbin/modprobe --ignore-install ohci1394

Note, autoloading of eth1394 when an _external_ IP-over-1394 capable
device is discovered is _not_ affected by this patch.
Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>

Shrinks eth1394.ko by about 5%.

Many of these functions have only one caller and are therefore auto-
inlined anyway.
Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>

ether1394_add_host() guarantees that hi->dev != NULL if hi != NULL.
Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>

Warn if hpsb_allocate_and_register_addrspace() failed.
Unregister the address space if something else failed.
Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>

The comment says it all.  This affects only asynchronous streams sent
via raw1394; the eth1394 driver has own code and needs an own fix.
Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>

SPIN_LOCK_UNLOCKED cleanup,use DEFINE_SPINLOCK instead
Signed-off-by: NMilind Arun Choudhary <milindchoudhary@gmail.com>
Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>

Shrinks object file size a little bit.
Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>

Everytime when eth1394 or a libraw1394 client updates the configuration
ROM, a certain sysfs attribute cannot be added since it already exists.
Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>

This is a coding style touch-up for ieee1394's handle_incoming_packet().

A preprocessor macro contained hardwired variable names and, even worse,
the 'break' keyword.  This macro is now unrolled and removed.

Also, all 'break's which had the effect of a return are replaced by
return.  And a FIXME comment is brought up to date.
Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>

alpha:

drivers/ieee1394/iso.c: In function 'hpsb_iso_xmit_sync':
drivers/ieee1394/iso.c:440: error: invalid use of undefined type 'struct task_struct'
drivers/ieee1394/iso.c:440: error: 'TASK_INTERRUPTIBLE' undeclared (first use in this function)
drivers/ieee1394/iso.c:440: error: (Each undeclared identifier is reported only once
drivers/ieee1394/iso.c:440: error: for each function it appears in.)
drivers/ieee1394/iso.c:440: warning: implicit declaration of function 'signal_pending'
drivers/ieee1394/iso.c:440: error: invalid use of undefined type 'struct task_struct'
drivers/ieee1394/iso.c:440: warning: implicit declaration of function 'schedule'
drivers/ieee1394/iso.c: In function 'hpsb_iso_wake':
drivers/ieee1394/iso.c:562: error: 'TASK_INTERRUPTIBLE' undeclared (first use in this function)
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> (brought into alphabetic order)

Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>

drivers/ieee1394/ieee1394_transactions.c fails for me if CONFIG_SMP=n

gcc complains:
  CC      drivers/ieee1394/ieee1394_transactions.o
drivers/ieee1394/ieee1394_transactions.c: In function 'hpsb_get_tlabel':
drivers/ieee1394/ieee1394_transactions.c:183: error:
'TASK_INTERRUPTIBLE' undeclared (first use in this function)
drivers/ieee1394/ieee1394_transactions.c:183: error: (Each undeclared
identifier is reported only once
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> (added comment)

Fix printk format string:
drivers/ieee1394/ieee1394_core.c:702: warning: format '%d' expects type 'int', but argument 2 has type 'size_t'
Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>

This considerably reduces the memory requirements for a packet and
eliminates ieee1394's dependency on CONFIG_NET.
Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>

This will point out firmware bugs.

I tested with 11 SBP-2 devices and one OS X PC and got these errors from
two old CD-RWs only.
Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>

Code beneath two labels called "fail" is actually also reached in case
of success.
Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>

We want bugs to show themselves.
Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>

Make unnecessarily generic code specific and thus simpler.
Shrink a lookup table from 128 to 16 bytes.
Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>

Whitespace, line breaks, braces...
Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>

The biggest chunk ever allocated by CSR1212_MALLOC is 1024 Bytes +
sizeof(struct csr1212_csr_rom_cache) big.  Most of the time much
smaller data structures are allocated.  Therefore vmalloc is a waste.

The one exception is csr1212_append_new_cache() which is called to
append a chunk of CSR1212_EXTENDED_ROM_SIZE + sizeof(struct
csr1212_csr_rom_cache) if the currently allocated ROM cache is too
small.  CSR1212_EXTENDED_ROM_SIZE is generously defined as 256 kBytes.
In SVN commit 1220, Steve Kinneberg lowered this to 2 kBytes in the
config_rom_2.4 branch.  This same commit also switched CSR1212_MALLOC
from kmalloc to vmalloc in the SVN trunk branch:

> r1220 | kberg | 2004-05-31 01:51:44 +0200 (Mon, 31 May 2004) | 13 lines
>
> CSR1212 Extended ROM bug fixes:
> trunk line changes:
>   - Use vmalloc instead of kmalloc
>   - Change delayed_reset_bus() to operate in a work_queue instead of a
>     timer interrupt.
>   - Fix hpsb_allocate_and_register_addrspace() to not allocate space
>     on top of already allocated space.
>   - Fix problems in csr1212.c filling ConfigROM images when extend
>     ROMs are present.
> config-rom-2.4 changes:
>   - Changed extended rom allocation from 256K to 8K.
(It was actually 2 kB, not 8 kB.)
>   - Fix hpsb_allocate_and_register_addrspace() to not allocate space
>     on top of already allocated space.
>   - Fix problems in csr1212.c filling ConfigROM images when extend
>     ROMs are present.

I am now setting CSR1212_EXTENDED_ROM_SIZE to 2 kB minus the overhead of
struct csr1212_csr_rom_cache.  Note, this code path is not used by the
in-kernel drivers though.  raw1394 could trigger it, but the respective
libraw1394 functions don't exist yet.

Furthermore, userspace programs can replace the entire local ROM via
raw1394.  If kmalloc does not fulfill their needs --- well, tough luck.
I decree that nobody needs such huge extended ROMs.  (Extended ROMs are
defined by IEEE 1212 clause 7.7.18.  The spec does not impose
practically relevant restrictions on the size of extended ROM chunks.)

Another potentially demanding use of CSR1212_MALLOC is if external
FireWire devices come with Extended ROM entries.  If they are too big
for kmalloc (or have been too big for vmalloc) we just fail to read
their ROM.  This is quite unlikely though, to my knowledge.
Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>

This small reorganization of public csr1212 functions saves one
exported symbol and a few bytes in the driver modules.
Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>

return -EINVAL becomes BUG_ON in checks of function call parameters.
Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>

Use u8, u32 etc. instead of u_int8_t, csr1212_quad_t etc.
Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>

csr1212 was written to be compiled either as part of the ieee1394 kernel
driver or of an anticipated IEEE 1212 userspace library.  We now drop
support for the latter.  The costs in terms of code footprint and depth
of abstraction are not countered by any actual benefit.

Also remove some obsolete #includes.
Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>

Delete unused code.
Make some extern functions static.
Remove superfluous inline keywords.
Move private definitions from csr1212.h to csr1212.c.
Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>

Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>

Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>

Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>

drivers/ieee1394/sbp2.c: In function 'sbp2util_access_timeout':
drivers/ieee1394/sbp2.c:399: error: 'TASK_INTERRUPTIBLE' undeclared (first use in this function)
drivers/ieee1394/sbp2.c:399: error: (Each undeclared identifier is reported only once
drivers/ieee1394/sbp2.c:399: error: for each function it appears in.)
drivers/ieee1394/sbp2.c:399: warning: implicit declaration of function 'signal_pending'
drivers/ieee1394/sbp2.c:399: warning: implicit declaration of function 'schedule_timeout'
drivers/ieee1394/sbp2.c: In function 'sbp2_prep_command_orb_sg':
drivers/ieee1394/sbp2.c:1438: warning: implicit declaration of function 'page_address'
drivers/ieee1394/sbp2.c:1438: warning: passing argument 2 of 'dma_map_single' makes pointer from integer without a cast
drivers/ieee1394/sbp2.c: In function 'sbp2_handle_status_write':
drivers/ieee1394/sbp2.c:1842: error: 'TASK_INTERRUPTIBLE' undeclared (first use in this function)

Possibly due to changes in -mm, but this file should explicitly include the
headers for the stuff it uses.
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> (brought into alphabetic order)

When the command ORB pool is created, the ORB list won't be accessed
concurrently.  Therefore we don't have to take the spinlock there.
Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>

Unlike the name suggests, "cmd->scatter_gather_element" holds only the
s/g table, not the actual s/g elements.  Since the table is only read
but never written by the device, DMA_BIDIRECTIONAL can be replaced by
DMA_TO_DEVICE which may be cheaper on some architectures.
Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>

In order to use OHCI-1394 physical DMA, all s/g elements, s/g tables,
ORBs, and response buffers have to reside within the first 4 GB of the
FireWire controller's physical address space.  Set the correct mask for
DMA mappings.
Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>

The members "dma_addr_t command_orb_dma" and "dma_addr_t sge_dma" of
sbp2.h::sbp2_command_info do not have to be aligned themselves --- only
the memory which they point to has to be.

The member "struct sbp2_command_orb command_orb" has to be aligned on
4 bytes boundary which is guaranteed because it contains u32 members.

The member "struct sbp2_unrestricted_page_table scatter_gather_element",
i.e. the SBP-2 s/g table, has to be aligned on 8 bytes boundary
according to the SBP-2 spec.  This is not a requirement for FireWire
controllers but could be expected by SBP-2 targets.

I see no need to align the members command_orb and
scatter_gather_element on CPU cacheline boundaries.  It could have
performance benefits, but on the other hand sbp2 has a somewhat wasteful
allocation scheme which should be optimized first before further tweaks
like cacheline alignments.  (E.g. don't always allocate SG_ALL s/g table
elements.)

Note, before as well as after the patch, the code relies on the
assumption that memory alignment in the virtual address space is
preserved in the physical address space after DMA mapping.
Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>

The subsystem rwsem is not used by the driver core at all, so the use of
it in the ieee1394 code doesn't make any sense.  They might possibly
want to use a local lock, but as most of these operations are already
protected by a local lock, it really doesn't look like it would be
needed.

Cc: Ben Collins <bcollins@debian.org>
Cc: Stefan Richter <stefanr@s5r6.in-berlin.de>
Cc: linux1394-devel <linux1394-devel@lists.sourceforge.net>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Make use of add_uevent_var() instead of (often incorrectly) open coding it.
Signed-off-by: NMichael Ellerman <michael@ellerman.id.au>
Signed-off-by: NEric Rannaud <eric.rannaud@gmail.com>
Cc: Kay Sievers <kay.sievers@vrfy.org>
Cc: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>

Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

For the places where we need a pointer to the mac header, it is still legal to
touch skb->mac.raw directly if just adding to, subtracting from or setting it
to another layer header.

This one also converts some more cases to skb_reset_mac_header() that my
regex missed as it had no spaces before nor after '=', ugh.
Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

For the common, open coded 'skb->mac.raw = skb->data' operation, so that we can
later turn skb->mac.raw into a offset, reducing the size of struct sk_buff in
64bit land while possibly keeping it as a pointer on 32bit.

This one touches just the most simple case, next will handle the slightly more
"complex" cases.
Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

Nobody ported ffmpeg from dv1394 to rawiso yet, and there is no
justification to remove dv1394 right now.

Nevertheless, a strong deprecation of this ABI makes a lot of sense,
especially as Kristian H's drivers shape up to be an attractive
alternative to the existing ones.  But we don't have a schedule at the
moment.
Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>